fix(sub): include ECH config in TLS share links and JSON subscription

echConfigList was stored under tlsSettings.settings but the share-link
and JSON-subscription generators only read fingerprint and
pinnedPeerCertSha256 from that bag, silently dropping ECH from VLESS,
Trojan and VMess links. Read echConfigList alongside them and flatten it
into tlsSettings.echConfigList for the JSON subscription.

Closes #4933

frontend/src/lib/xray/inbound-link.ts

@@ -232,6 +232,7 @@ export function genVmessLink(input: GenVmessLinkInput): string {
     if (tlsSettings.serverName.length > 0) obj.sni = tlsSettings.serverName;
     if (tlsSettings.settings.fingerprint.length > 0) obj.fp = tlsSettings.settings.fingerprint;
     if (tlsSettings.alpn.length > 0) obj.alpn = tlsSettings.alpn.join(',');
+    if (tlsSettings.settings.echConfigList.length > 0) obj.ech = tlsSettings.settings.echConfigList;
     if (tlsSettings.settings.pinnedPeerCertSha256.length > 0) {
       obj.pcs = tlsSettings.settings.pinnedPeerCertSha256.join(',');
     }

sub/subJsonService.go

@@ -258,6 +258,9 @@ func (s *SubJsonService) tlsData(tData map[string]any) map[string]any {
 	if fingerprint, ok := tlsClientSettings["fingerprint"].(string); ok {
 		tlsData["fingerprint"] = fingerprint
 	}
+	if ech, ok := tlsClientSettings["echConfigList"].(string); ok && ech != "" {
+		tlsData["echConfigList"] = ech
+	}
 	if pins, ok := tlsClientSettings["pinnedPeerCertSha256"].([]any); ok && len(pins) > 0 {
 		tlsData["pinnedPeerCertSha256"] = pins
 	}

sub/subService.go

@@ -894,6 +894,11 @@ func applyShareTLSParams(stream map[string]any, params map[string]string) {
 		if fpValue, ok := searchKey(tlsSettings, "fingerprint"); ok {
 			params["fp"], _ = fpValue.(string)
 		}
+		if echValue, ok := searchKey(tlsSettings, "echConfigList"); ok {
+			if ech, _ := echValue.(string); ech != "" {
+				params["ech"] = ech
+			}
+		}
 		if pins, ok := pinnedSha256List(tlsSettings); ok {
 			params["pcs"] = strings.Join(pins, ",")
 		}
@@ -919,6 +924,11 @@ func applyVmessTLSParams(stream map[string]any, obj map[string]any) {
 		if fpValue, ok := searchKey(tlsSettings, "fingerprint"); ok {
 			obj["fp"], _ = fpValue.(string)
 		}
+		if echValue, ok := searchKey(tlsSettings, "echConfigList"); ok {
+			if ech, _ := echValue.(string); ech != "" {
+				obj["ech"] = ech
+			}
+		}
 		if pins, ok := pinnedSha256List(tlsSettings); ok {
 			obj["pcs"] = strings.Join(pins, ",")
 		}